US2503653A - Apparatus for dishing and variegating substantially flat glass sheets - Google Patents

Description

April 1950 E R BOYLES ETAL 2,503,653

APPARATUS DISHING AND VARIEGATING SUBSTANTIALLY FLAT GLASS SHEETS 3 Sheets-Sheet 1 Filed Sept. 24, 1945 UL IIHIIIIJLILLLl INVEN TORSi ram 01s.

April 11, 1950 E. R. BOYLES ETAL 2,503,653

APPARATUS FOR DISHING AND VARIEGATING SUBSTANTIALLY FLAT GLASS SHEETS Filed Sept. 24, 1945 3 Sheets-Sheet 2 I A INVENTORS.

- fDGfiK k. Bar/.55. BY "CL/YIFENCE M. 5977/50/16 April 1, 1950 E. R. BOYLES ETAL 2,503,653

. APPARATUS FOR DISHING AND VARIEGATING SUBSTANTIALLY FLAT GLASS SHEETS Filed Sept. 24, 1945 5 Sheets-Sheet 3 INVENTORS, fps/7x EBay/-55,

(AHAf/VC'E, M. Fiff/Sonc Patented Apr. 11, 1950 APPARATUS FOR DISHING AND VARIE- GATIN G SUBSTANTIALLY FLAT GLASS SHEETS Edgar B. Boyles and Clarence Marion Pattison, Hartford City, Ind.; said Pattison assignor to said Boyles as trustee Application September 24, 1945, Serial No. 618,134

Claims. (Cl. 49-67) This invention relates to apparatus for shaping glass or like material to include therein scallops, flutes, annular corrugations and which, if desired, may be highly ornamented on the surface.

The chief object of the present invention is to shape glass or like sheets for lamp shade purposes and the like and which are highly ornamented, if desired.

The chief feature of the present invention resides in subjecting a glass sheet, surface ornamented or otherwise, to a softening heat that is just sufficient to permit gravity conformation to a skeleton mold of the sheet, usually but not necessarily flat, and of the desired peripheral outline, to produce in that sheet the desired conformation.

After conformation, the glass article is gradually cooled (annealed as it were) for removal of strain so that slight shock does not result in shattering for glass primarily is held together by surface tension in the outer surfaces.

For purposes of illustration, lamp shade formation is disclosed herein. Furthermore, since a complete disclosure of suitable apparatus will also disclose simultaneously the process, reference primarily will be had to the former. 'Also by wa of example only, conformance of the concave type is herein disclosed, but it is to be understood convex type conformance is contemplated within the scope of this disclosure by suitabl reversal. I

Other objects and features of the invention will be set forth more fully hereinafter.

The full nature of the invention will be understood from the accompanying drawings and the following description and claims.

In the drawings- Fig. 1 is a top plan view of a skeleton mold of concave type with pattern addition of similar type and the conformed article therein, a portion of the latter being broken away to show the former in plan, certain dotted lines indicating the initial periphery of the substantially flat sheet prior to conformance.

Fig. 2 is a vertical sectional view taken on broken line 22 of Fig. 1 and in the direction of the arrows.

Fig. 3 is a view similar to Fig. 1 and a modified form of apparatus and article and of a portion of same.

Fig. 4 is a vertical sectional view taken on line l4 of Fig. 3 and in the direction of the arrows.

Fig. 5 is a central vertical sectional view of a third embodiment of the invention, a portion of 2 the article being broken away to show a portion of the apparatus in greater detail.

Fig. 6 is a quarter plan view of the apparatus shown in Fig. 5.

Fig. 7 is a top plan view, similar to Figs. 1 and 3, with a portion of the article broken away, and of another embodiment of the invention.

Fig. 8 is a view, similar to Fig. 2, and of the form of the invention illustrated in Fig. 7.

Fig. 9 is a plan view of an umbrella frame type form of the invention whereby substantially full length flutes are produced.

In Figs. 1 and 2 of the drawings l0 indicates a bowl-like shell portion having central aperture H therein and provided with a plurality of supporting vanes l2. Within said bowl is an offset aperture 13 and a radial notch M to facilitate article removal following conformation.

Centrally positioned relative to the bowl is a base plate IE to the underface of which are rigidly secured the inner ends it of the outwardly and radially directed ribs I7 and same have a curvature less than that of bowl it so that they bear as at 18 upon the upper periphery 19 of the bowl. The ends 20 project beyond the bowl.

A flat sheet of glass S is nested upon and preferably within the ribs and has an outer periphery greater than the bowl periphery. The associated parts are then subjected to a gradually increasing heat, as by passing same into a tunnel lehr or the like, the rate of temperature rise in glass determining the heat supply variation.

As the temperature approaches the bending temperature, the glass sheet sags at the unsupported center due to its unsupported mass. This temperature is maintained until the glass sheet S, having hole H, rests upon plate [5 as at B and conforms to the shape of the ribs H as at G.

Since the spacing between ribs ll, near the periphery of plate I5, is quite small, at this point little or no sag of portion C occurs. However, where the spacing between ribs H is sufiicient, as at if! or beyond and slightly inside of the bowl periphery, glass sag between the ribs occurs. This results in a scallop or flute effect F.

Following such conformance of the sheet, the same and the skeleton form is subjected to a decreasing temperature, the rate of temperature fall and duration of cooling, to produce in effect annealed ware, being determined by the character of the glass, etc. as well understood in the art of cooling (annealing) glassware.

When the mold and article emerges from the annealing oven, if such be used, instruments are applied to notch l4 and hole I3 and the article elevated from the mold. Then a new sheet is applied as before and process described is repeated.

Referenc will now be had to Figs. 3 and 4, wherein H indicates a shallow bowl or shell having vsupporting exterior vanes H2 and centrally apertured at III. The umbrella frame comprises flat base plate H5 to which on the underface is suitably secured, as by welding or the like, the inner ends H6 of the radially directed curved ribs H! which terminate within the bowl and have the same curvature thereof as illustrated.

As before the glass sheet rests :upon the ribs, and when properly heated sags to conform the shell interior. The upper face of the plate end is fluted where it sags about the ribs.

Reference will now be had to Figs. '5 and 6 wherein 2N! indicates the shell or bowl (centrally apertured at 2 H and having external supporting vanes-212. The upper edge of the bowl is indicated at 2 I 9.

Herein the base is of external type comprising a ring 2l5 from which projects the ribs 2I"! secured thereto as by welding or the like at 2H5. This rib structure is set .in the bowl and then the glass sheet .is applied. When sufficiently heated, the unsupported central mass sags and in so doing .the scallops in the glass edge are formed. Complete conformance of the glass to the bowl occurs except at the edge as illustrated.

'Re'ference will now be had to Figs. 7 and 8 wherein 3H0 indicates the shell centrally aperturedas at 3. and supported by external vanes 312. .An annular ring '3l5 rests upon the shell interior.

"The glass-sheet upon sagging thus conforms "to'theshell interior near the outer portion, in-

cludes a coaxial corrugation M and a slightly curved central portion N apertured at O forlamp shade or like purposes.

"Reference will now be had to 'Fig. '9. Herein the central "plate, such as 1,5 in Figs. 1 and .2, and H5 in Figs. 3-and 4, is omittedand all ribs '3" have their inner .ends '316 welded together. The resultant umbrella frame, when used with any .shll, -prod'uces what mightbe termed 'full length flutes, although obviously the central portion'o'f the dished glassware willnot'be fluted'Ibecause of lack of space between the ribs near "the inner ends thereof.

While the invention has been illustrated and described in .great detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character.

The several modifications described herein as well as others which will readily suggest themselves .to persons skilled in this art, all are considered to be within the broad scope of the invention, reference being had to the appended claims.

The invention claimed is:

1. Apparatus for dishing and variegating substantially flat glass sheets comprising a main support mold of metal for head reflection purposes, and .a supplementary mold having a plur'ality of spokes :and directly supported by the main mold, the fiat sheet, when supported by both molds and subjected to a glass sagging temperature, conformingby gravity thereto.

2. Apparatus as defined by claim 1 wherein means is provided and connected to one end of each spoke for supplementary mold imitation.

3. Apparatus as defined by claim 2 whereinlthe spoke connecting means comprises a peripheral member at the outer ends of the spokes.

4. Apparatus as defined by claim 2 wherein the spoke connecting means comprisesa central member at the inner ends of the spokes.

:5. Apparatus as defined by claim 2 wherein the spoke connecting means comprises welding material at the adjacent inner ends oi the spokes, said ends terminating immediately contiguous to each other.

IEDGAR 1R. 'BOYEES. CLARENCE MARION .P ATTIS ON.

REFERENCES "CITED The following references-are 0f record .-in"\the file of this patent:

UNITED STATES PATENTS Number Name "Date 327,406 Northwoo'd Sept329, T885 '336;666 Ripley 1Feb.23,"1886 "632,008 Dorpols Aug. 29, 1899 934,094 Peterson Ssptjlfll, 1909 1,5 93;61'4 Zeiler July "27,1926

2,122,083 Boudinetal. June 28, 1938 2,194,538 Allen Mar; 26,1940

FOREIGN PATENTS Number Country 'Date 1281447 Great Britain une 26, '1'919

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